<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>级联菜单</title>
		<script type="text/javascript">
			var jsonob=[
			{
			"hb": [
					{"沧州":["泊头","南皮","东光"]},
					{"廊坊":["香河","燕郊","三河"]}
				]
			},
			{
			"bj": [
					{"海淀":["上地","马连洼","知春路"]},
					{"大兴":["西红门","黄村","高米店"]}
				]
			}
			];

			function selectProvince(str)
			{
				
			}
		</script>
	</head>
	<body>
		<label>省份:
			<select id="province" onchange="selectProvince(this.value)">
				<option value="default" selected="selected">请选择</option>
				<option value="hb">河北</option>
				<option value="bj">北京</option>
			</select>
			<select id="city" onchange="">
				<option value="default" selected="selected">请选择</option>
				<option value="hb">河北</option>
			</select>
		</label>
	</body>
</html>
